<!DOCTYPE html>
<html>
<body>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<script>

var previousOrientation = screen.orientation;

test(function() {
    var caught = false;
    try {
        screen.orientation.unlock();
    } catch (e) {
        caught = true;
    }

    assert_false(caught);
}, "Test that screen.orientation.unlock() doesn't throw when there is no lock");

test(function() {
    [ 'any', 'portrait', 'landscape', 'portrait-primary', 'portrait-secondary',
      'landscape-primary', 'landscape-secondary' ].forEach(function(orientation) {
        var pending = true;
        screen.orientation.lock(orientation).then(function() {
            pending = false;
        }, function() {
            pending = false;
        });

        assert_true(pending);
    });
}, "Test that screen.orientation.lock returns a pending promise.");

test(function() {
    assert_equals(screen.orientation, previousOrientation);
}, "Test that screen.orientation.lock() is actually async");

test(function() {
    var caught = false;
    try {
        screen.orientation.unlock();
    } catch (e) {
        caught = true;
    }

    assert_false(caught);
}, "Test that screen.unlock() doesn't throw when there is a lock");

</script>
</body>
</html>
